Cache partially-completed submissions to file (and reload that file when app is relaunched)

[Kazjon]

Due to the way Android handles app memory, we can't guarantee that users can leave an app and then return to it with their state intact. One partial solution would be temp files that cache partially completed solutions. Then, if and only if such a temp file exists, the app would return to it when foregrounded/opened again.

[WildWeazel]

Best way to do this is with SharedPreferences, and clear them when the upload completes